Improvement in horseshoes



y UNITED STATES PATENT OFFICE.

DAVID OUMMING, OF SORREL HORSE, PENNSYLVANIA.

IMPROVEMENT IN HORSESHOES.

Specification forming part of Letters Patent No. 17,265, dated May 12, 1857.

To all whom it may concern:

Be it known that I, DAvTD CUMMING, of Sorrel Horse, county of Montgomery, in the State of Pennsylvania, haveinvented certain new and useful Improvements in Horseshoes; and I do hereby declarethat the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature of my invention consists in an improved mode of attaching and securing movable calks to ordinary horseshoes, as hereinafter described.

To enable others skilled in the art to make and use my invention,I will proceed to describe its construction and operation.

1In the accompanying drawings, Figure l represents a bottom View of a horseshoe with my improvement, Fig. 2, a vertical section at w m, Fig. l; Fig. 3, a modification of the holder or securing-bar B; Figs. 4 and 5, views of plain and chiselpointed calks.

A represents a common horseshoe; O D E,

the movable calks, on which are short studs or screws c, adapted to holes tapped in the shoe at the point and heels. B is a holder plate or rim, which has an opening in its forward end or point, to accommodate the rectangular base ofthe calk C, which passes through said plate, and has its heels or rear ends squared off to fit flush against the inner sides ofthe heel-calks D E.` Said plate has drilled through it, near the center of either side, holes d d, through which pass the bolts a a, that secure said plate to the bottom of the shoe. The Y bolts a a may, if desired, have their heads countersunk in the plate B.

It will be observed that the plate B is made only about an eighth of an inch thick through the middle or between the point and heelcalks, but is enlarged where it comes incontact with the calks, in order to present asufticiently largebearingsurface againstsaid calks to insure the desired result-viz., the perfect clamping or securing of the calks in position, or the prevention of any turning or unscrewing, which has been found an existing disadvantage to all movable calks, except those which are placed on shoes formed with recesses or shoulders to fit the bases of the calks; but this mode, rendering the expense of the shoe very great and being only practicable where the shoe is manufactured for the express purpose, has been found incapable of an introduction into the trade; but with my improvement it will be readily perceived that the desired object relative to the calks is accomplished, while the plate B can be manufactured for a trifle, and applied to the shoes without making any alteration in the manufacture of the shoe, and is also applicable to the shoes in use, and beside securing the movable calks strengthens the shoe and receives the wear in a great measure.

I do not lay any claim to movable calks screwed into the bottom of a horseshoe; but

What I claim as my invention, and desire to secure by Letters Patent, is

The false bottom or holding-plate B, constructed as herein described, when used in connection with the movable calks C D E, as specified.

In testimony whereof I have hereunto set my hand this 11th day of April, 1857.

DAVID CUMMIN G.

Witnesses:

DAVID D. WILLARD, HENRY CoLsoN. 

